<!DOCTYPE html>
<HTML>
<HEAD>
  <TITLE> ZTREE DEMO - big data common</TITLE>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <link rel="stylesheet" href="../../../css/demo.css" type="text/css">
  <link rel="stylesheet" href="../../../css/zTreeStyle/zTreeStyle.css" type="text/css">
  <script type="text/javascript" src="../../../js/jquery-1.4.4.min.js"></script>
  <script type="text/javascript" src="../../../js/jquery.ztree.core-3.5.js"></script>
  <script type="text/javascript" src="../../../js/jquery.ztree.excheck-3.5.js"></script>
  <script type="text/javascript" src="../../../js/jquery.ztree.exedit-3.5.js"></script>
  <SCRIPT type="text/javascript">
    <!--
    var setting = {
      check: {
        enable: true
      },
      data: {
        simpleData: {
          enable: true
        }
      },
      callback: {
        onNodeCreated: onNodeCreated
      }
    };

    var dataMaker = function(count) {
      var nodes = [],
        pId = -1,
        min = 10,
        max = 90,
        level = 0,
        curLevel = [],
        prevLevel = [],
        levelCount,
        i = 0,
        j,
        k,
        l,
        m;

      while (i < count) {
        if (level == 0) {
          pId = -1;
          levelCount = Math.round(Math.random() * max) + min;
          for (j = 0; j < levelCount && i < count; j++, i++) {
            var n = { id: i, pId: pId, name: "Big-" + i };
            nodes.push(n);
            curLevel.push(n);
          }
        } else {
          for (l = 0, m = prevLevel.length; l < m && i < count; l++) {
            pId = prevLevel[l].id;
            levelCount = Math.round(Math.random() * max) + min;
            for (j = 0; j < levelCount && i < count; j++, i++) {
              var n = { id: i, pId: pId, name: "Big-" + i };
              nodes.push(n);
              curLevel.push(n);
            }
          }
        }
        prevLevel = curLevel;
        curLevel = [];
        level++;
      }
      return nodes;
    };
    var ruler = {
      doc: null,
      ruler: null,
      cursor: null,
      minCount: 5000,
      count: 5000,
      stepCount: 500,
      minWidth: 30,
      maxWidth: 215,
      init: function() {
        ruler.doc = $(document);
        ruler.ruler = $("#ruler");
        ruler.cursor = $("#cursor");
        if (ruler.ruler) {
          ruler.ruler.bind("mousedown", ruler.onMouseDown);

        }
      },
      onMouseDown: function(e) {
        ruler.drawRuler(e, true);
        ruler.doc.bind("mousemove", ruler.onMouseMove);
        ruler.doc.bind("mouseup", ruler.onMouseUp);
        ruler.doc.bind("selectstart", ruler.onSelect);
        $("body").css("cursor", "pointer");
      },
      onMouseMove: function(e) {
        ruler.drawRuler(e);
        return false;
      },
      onMouseUp: function(e) {
        $("body").css("cursor", "auto");
        ruler.doc.unbind("mousemove", ruler.onMouseMove);
        ruler.doc.unbind("mouseup", ruler.onMouseUp);
        ruler.doc.unbind("selectstart", ruler.onSelect);
        ruler.drawRuler(e);
      },
      onSelect: function(e) {
        return false;
      },
      getCount: function(end) {
        var start = ruler.ruler.offset().left + 1;
        var c = Math.max((end - start), ruler.minWidth);
        c = Math.min(c, ruler.maxWidth);
        return { width: c, count: (c - ruler.minWidth) * ruler.stepCount + ruler.minCount };
      },
      drawRuler: function(e, animate) {
        var c = ruler.getCount(e.clientX);
        ruler.cursor.stop();
        if ($.browser.msie || !animate) {
          ruler.cursor.css({ width: c.width });
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          ruler.cursor.animate({ width: c.width }, { duration: "fast", easing: "swing", complete: null });
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        ruler.count = c.count;
        ruler.cursor.text(c.count);
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    };
    var showNodeCount = 0;

    function onNodeCreated(event, treeId, treeNode) {
      showNodeCount++;
    }

    function createTree() {
      var zNodes = dataMaker(ruler.count);
      showNodeCount = 0;
      $("#treeDemo").empty();
      setting.check.enable = $("#showChk").attr("checked");
      var time1 = new Date();
      $.fn.zTree.init($("#treeDemo"), setting, zNodes);
      var time2 = new Date();

      alert(" " + zNodes.length + " nodes are initialized, " + showNodeCount + " nodes generate the DOM object."
        + "\n\n Initialization zTree total time: " + (time2.getTime() - time1.getTime()) + " ms");
    }


    $(document).ready(function() {
      ruler.init("ruler");
      $("#createTree").bind("click", createTree);

    });
    //-->
  </SCRIPT>
</HEAD>

<BODY>
<h1>One-time Large Data Loading</h1>
<h6>[ File Path: bigdata/common.html ]</h6>
<div class="content_wrap">
  <div class="zTreeDemoBackground left">
    <ul>
      <li>
        <span>Adjust the total number of nodes to the test load speed: </span>
        <div id="ruler" class="ruler" title="can drag to adjust the number of nodes">
          <div id="cursor" class="cursor">5000</div>
        </div>
        <div style="text-align: center; width: 220px;">
          <span>checkbox</span><input type="checkbox" id="showChk" title="whether to display checkbox" class="checkbox first"/>&nbsp;&nbsp;&nbsp;&nbsp;
          [ <a id="createTree" href="#" title="Initialize zTree" onclick="return false;">Initialize zTree</a> ]
        </div>
      </li>
    </ul>
    <ul id="treeDemo" class="ztree"></ul>
  </div>
  <div class="right">
    <ul class="info">
      <li class="title">
        <h2>1, Explanation of large data load</h2>
        <ul class="list">
          <li>1) zTree v3.x optimized for one-time large data loading capacity, using a lazy loading technique, which does not expand the node does not create child nodes of the DOM.</li>
          <li class="highlight_red">2) If a maximum of 100 nodes each, but a total number of several thousand or even tens of thousands of nodes, and the parent node is collapsed by default to optimize the most obvious effect, very fast.</li>
          <li class="highlight_red">3) For the next level there are thousands of sub-node case, the optimization of lazy loading is invalid, proposal to consider asynchronous page loading.</li>
          <li class="highlight_red">4) if you set the data to all the parent nodes are expanded, the optimization of lazy loading is invalid, proposal to not expand all parent node when you initialize zTree.</li>
          <li>5) set the display checkbox / radio will affect some of the performance.</li>
          <li>6) DOM generated using addDiyDom function will affect the speed, the number of nodes determines the number of impact situations.</li>
          <li>7) Using 'onNodeCreated' callback function to manipulate nodes object will affect the speed, the degree of influence determined by the number of nodes.</li>
        </ul>
      </li>
      <li class="title">
        <h2>2, Explanation of setting</h2>
        <ul class="list">
          <li>No special configuration.</li>
        </ul>
      </li>
      <li class="title">
        <h2>3, Explanation of treeNode</h2>
        <ul class="list">
          <li>No special requirements on the node data, the user can add custom attributes.</li>
        </ul>
      </li>
    </ul>
  </div>
</div>
</BODY>
</HTML>